Planning application
20 Air Street London W1B 5AN
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Installation of new plant on the main roof of the building.
As published by the council, reference 26/00013/FULL
Application record
- Reference
- 26/00013/FULL
- Type
- Full Planning Permission Application
- Status
- Decided
- Decision
- Granted As published: Application Permitted
- Received
- 5 Jan 2026
- Validated
- 23 Feb 2026
- Decided
- 10 Apr 2026
- Ward
- West End
- Decision by
- Delegated Decision
- Postcode
- W1B 5AN
Site history
Applications at this address on the Westminster register
This site has had 3 applications since 2026: 3 approved, 0 refused.
-
26/00274/LBC Granted
20 Air Street London W1B 5AN
Installation of two rooftop condenser units.
-
26/00273/FULL Granted
20 Air Street London W1B 5AN
Installation of two rooftop condenser units.
Timeline
Dates from the published record
-
5 Jan 2026
Received by Westminster
-
23 Feb 2026
Validated
Checked as complete and ready for consideration.
-
10 Apr 2026
Decision issued: Application Permitted
-
20 Jul 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Left City Ltd. Agent, registered in Glasgow
Active · incorporated 2012 · Glasgow
42 applications on PlanIndex · across 7 councils · 97% granted
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
23 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Watch members (£5 a month) open the document list from here.
Open the documentsWhat this grant of permission means
Westminster granted permission on 10 April 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About full applications
A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
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Ground Floor 17 Air Street London W1B 5AF
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Installation of a new entrance door within the existing shopfront at ground floor level; a new door opening within the existing glazed shopfront and fitting a single, inward-opening, painted timber framed glazed entrance door.
Awaiting decision Full applications Windows or glazing -
Ground Floor 17 Air Street London W1B 5AF
84% historically approved · decision due ~29 Oct
Display of externally illuminated projecting sign measuring 0.8m X 0.7m and externally illuminated fascia sign measuring 4.7m X 0.7m
Withdrawn Advertising 10 docs -
The Glass Blower 42 Glasshouse Street London W1B 5DW
84% historically approved · decision due ~21 Jul
Display of two externally illuminated hanging signs each measuring 1.20m x 0.90; two internally illuminated menu cases each measuring 0.50m x 0.38m; two house name letters each measuring 1.80m x 0.56m; two door plaque each measuring 0.25m x 0.25m; two sets of sign written letters each measuring 0.78m x 0.10m; 1x set of individual house number measuring 0.76m x 0.10m; two amenity boards each measuring 1.00m x 0.60m; and two chalkboards each measuring 1.00m x 0.60m.
Awaiting decision Advertising 4 docsSeveral homes -
The Glass Blower 42 Glasshouse Street London W1B 5DW
87% historically approved · decision due ~7 Jul
Painting of facade, windows and doors.
Awaiting decision Full applications Windows or glazing 6 docs -
20 Air Street London W1B 5AN
Installation of two rooftop condenser units.
Granted Heritage and listed buildings 19 docs -
Venture House 27 - 29 Glasshouse Street London W1B 5DF
89% historically approved · decision due ~4 Aug
Samples of facing materials pursuant to condition 3 of Llsted building consent dated 30 July 2024 (RN :24/02163/LBC)
Decided
Other full applications
In Westminster
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26/06295/FULL Awaiting decision
15 Warwick Way London SW1V 1QT
Installation of a new shopfront with Medication Dispensing Outlet.
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26/06297/FULL Awaiting decision
15 Warwick Way London SW1V 1QT
Alterations to rear elevation at basement level comprising replacement window and installation of double opening door.
-
26/06294/FULL Awaiting decision
15 Eaton Mews South London SW1W 9HP
Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.
-
26/06317/FULL Awaiting decision
124 Hamilton Terrace London NW8 9UT
Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)
-
26/06273/FULL Awaiting decision
9A Grosvenor Square London W1K 5AE
Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)